diff --git a/setup.py b/setup.py
index 178db9b..29644b2 100644
--- a/setup.py
+++ b/setup.py
@@ -28,7 +28,7 @@ from setuptools.command.test import test as TestCommand
 class PyTest(TestCommand):
     def finalize_options(self):
         TestCommand.finalize_options(self)
-        self.test_args = []
+        self.test_args = ['-x', 'build/lib/pygal']
         self.test_suite = True
 
     def run_tests(self):